Tower or mast



Aug. 27, 1946. H. COHEN TOWER OR MAST Filed Sept. 8, 1944 l1 I 'h,

ENToR. fizzr ozaz C k BY W ATTOR N EYS WITNE S Patented Aug. 27, 1946 UNITED" STATES PATENT OFFIC I T' 2,406,668 Q TOWEBVOR'MAST I Harold Cohen, Elizabeth, N. J.

Application September 8, 1944, Serial No. 553,136

This invention relates to the construction of towers, masts and analogous structures.

The principal object of the present invention is the provision of improvements whereby structural elements may be rigidly secured to each other in extended relation regardless of any inequalities in the cross-sectional sizes of such elements as they are manufactured;

A further object is the provision of improvements of the indicated character which enables the fabrication of the class of structures mentioned, and also enables them to be dismantled quickly and easily.

A further object is the provision of means of the indicated character which not only rigidly secures the components of a structure to each other, but also affords a good electrical connection between the parts in construction of towers and masts.

The nature of the invention and its distinguishing features. and advantages will appear when the following specification is read in conjunction with the accompanying drawing; in which- Fig. 1 is a fragmentary vertical sectional view showing telescoped structural elements rigidly secured in accordance with the invention.

Fig. 2 is a sectional view taken on the line 2-Z of Fig. 1.

Fig. 3 is a sectional view taken on the line 33 of Fig. 1 omitting the securing devices, but

, a portion of its length.

In the manufacture of tubing to be used, as structural elements, such as the elements It] and II, they are not always of uniform cross-sectional size for a close interfit of the elements when telescoped. Unless provision is made for such inequalities the elements cannot be rigidly secured to each other in an extended telescoped relation and they will be loose and wobble.

In accordance with the presentinvention use is made of a securing device of such type that a pair of the same in use cooperate with each other 4Claims. (Cl. 287--103) to effect the rigid securement of the structural elements aforesaid.

The securing device referred to consists of two main parts. One of said parts consists of a crossbar l2 having a clamping member 13 fixed on one end thereof in any suitable manner. The member I3 is disposed at a right angle to the cross-bar l2, and has laterally extending projections M at or near the ends thereof. The cross-bar 12 has a longitudinal slot l5 therein near the other end thereof. The other main part l5 of the device is wedge shape and is adapted to be received in the slot 15 so as to be disposed at a right angle to the cross-bar l2 in opposition to the member l3.

Two similar securing devices are used at a right angle to each other. Consequently, each element I0 and H has diametrically disposed holes I! therein which register with each other in pairs to receive one cross-bar I 2, and each element l0 and II also has diametrically disposed holes l8 therein which register with each other in pairs to receive the second cross-bar l2. The element In also has spaced holes 19 to receive the projections M of the respective clamping members l3.

When the elements In and H are in the telescoped relation, the cross-bars [2 may be extended transversely through the elements It] and II at a right angle with respect to each other by reason of the holes I! and I8, and the projections M are disposed in the holes 19. By. inserting the clamping members l6 into the respective slots I5 and forcing them downwardly, said members It will cooperate with the cross-bars I2 while bearing on the element Ill. This will cause the projections I4 to bear on the element H in vertical planes at a right angle with respect to each other, and the element II, in turn, will impinge on the cross-bars l2 at the points designated 20 in Fig. 3. In this manner the elements In and H are rigidly secured in the telescoped extended relation.

The size of the holes I! and I8 may be somewhat larger than'the cross-sectional size of the cross-bars l2. This may cause the element II to be off-center with respect to the element III. In practice the variance from true axial alinement is negligible. The holes I! and I8 may be of such size and arrangement to assure axial alinement of the elements In and II when secured. The difference in the interior diameter of the element In with respect to the exterior diameter of the element l l is exaggerated in the drawing.

The various parts made of suitable metal and secured in the manner described afford good electhereof are telesooped, said portions having regis- I tering holes therein, a cross-bar extending loosely in the holes in said portions transversely o fsaid portions, and a device acting on said elernents to rigidly secure said elements in the telescoped relation, and wherein the inner telescoped portion laterally impinges on said cross-barf.

2. In a, structure of the character described, tubular structural elements arranged so that portions thereof are telescoped, said portions having registering holes therein, cross-bars extending loosely in the holes in said portions transversely of said portions and at a right angle with respect to each other, and means cooperating with said cross-bars and acting on said portions to rigidly secure said elements in the telescoped relation, and wherein the inner telescoped portion laterally impinges on said cross-bars.

'3. In a structure as set forth in claim 1, wherein said device consists of two cooperative parts capable of exerting a clamping action.

4. In a structure as set forth in claim 1, wherein said device consists of two cooperative parts capable of exerting a clamping action, and one of said parts has projections extending through the outer telescoped portion and bearing on the inner telescoped portion.

' HAROLD COHEN. 

